SparkPeople recommends eating more slowly, and I've been making an effort to chew more thoroughly. To remind myself to do this, I made a little card saying, "Slow down". I attached it to a place card holder that I keep with my condiments.
Setting it in front of me when we sit down to eat reminds me to look at it during my meal, and I chew more thoroughly.
It is working really well: I feel full before I have overeaten.
With my place card holder, you can use both sides. On my cards I have:
"Slow down"; "Chew 100 times"; "Enjoy your food"; "Put down your fork between bites."
Here is the kind of place card holder I use; it has an alligator clip: http://tinyurl.com/4xxxccb